JPS587513A - Digital transit - Google Patents

Abstract

PURPOSE:To make it possible to perform interpolation within a unit of the lowest digit reading, by providing an eccentric cam between a tightening frame part for a rotary shaft and its fine adjusting mechanism, a rotary arm for the eccentric cam, and an interpolating male screw which is contacted with the arm and has an interpolating scale of digital angle values. CONSTITUTION:A target point Pm is collimated with a center Pm' of a cross lines 41 by a telescope 1. Then a tightening frame 11 is tightened to the rotary shaft 10 by a tightening screw 15. The arm part 17 of the tightening frame 11 is rotated by a fine adjusting knob 22 so as to align the target Pm with the Pm'. At this time, the digital angle of the Pm is dispaled on a display 7. Thus the display value of the interpolating scale is obtained by the fine tuning performed by the rotation of an interpolating knob 35 through a cam 32. Therefore, the interpolation within the unit of the lowest digit reading can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides horizontal and vertical degrees O! l! 11R device using an encoder.

As shown in Fig. 1, Digital Tra/Shift consists of 1 telescope 1 and supports 2s and 2b that rotatably support the telescope 1.
It is composed of a stand 2 that has an M shape, and a base 3 that supports the stand 2 rotatably around a vertical axis. A photoelectric encoder 4 for horizontal reading is built into the lower part of the rack 2. The encoder 4 includes a slit plate 4b that is fixed to the mount part 2 and rotates with the rotation of the mount part 2, and a base part 3.
hood plate 4a fixed to, and these code plates 4-,
The slit plate 4bt is composed of a round light emitting element 4c that illuminates and a light receiving element 4d that receives the illumination light. Also attached to the cradle support 2bllC is a round encoder 5 which reads the rotation angle of the telescope IC1, that is, the elevation angle. In the front, the support 21 is equipped with a zero performance nose part 6 to process the read signal from the Niko/4.5 and convert it into an angle value, and an angle value from the calculation part 6 as a horizontal minute angle and a right angle for height. Digital display 7 for digital display
have. Then, the digital controller/
As shown in Figure Is2, the angle measurement using the telescope is carried out by rotating the telescope 1 to standardize the measurement point p, and measuring the rotation angle of the mount at this time using the encoder 4.5. Ru.

The digital track/shift configured in this way is much simpler than the conventional optical minute scale reading method in which the measured angle is digitally displayed and the angle f is read. ! l! It has the advantage that there is little error in taking it.

In addition, l! by encoder! The operational calculations include rounding, direct/reverse observation, double angle surveying, track/dimension measurement, and other measurement methods such as rounding, memorization, and writing for each measurement, which are performed using electrical circuits.
Another advantage is that readout, reference angle movement, etc. can be easily performed with a single switch operation. However, on the other hand, there is a fundamental drawback of digital measurement, that is, it is impossible to perform interpolation within the lowest reading unit. That is, in composition 2, if the lowest reading position of this digital driver/git is 10#,
Now, if we standardize 20 points on telescope 1, it will be 142° 5
For example, if the square is 2'30#, this tiger/
In the digital camera, Pl and P2 are specified in the lowest reading unit.
, P, No matter which measurement point is used as the standard, all are 14293
2'30#, and if smaller square steel angles cannot be made (/1), there will be a drawback.To solve this problem, the lattice pitch of the code plate and slit plate of the encoder It is conceivable to make the lowest reading unit of the encoder smaller by making it smaller, but this has the disadvantage that the length of the code plate becomes 1 distance, which also reduces the thickness f.
In the incremental 2/co I, when the grating pitch becomes small, the pitch total a becomes Iqa when the rotation speed of the #11 foot object is fast. Alternatively, it is possible to make the lowest reading unit of the encoder smaller by increasing the code diameter without changing the grating pitch, but this would lead to the transit itself becoming larger and the p1
The drawback is that it causes inconvenience in carrying and operating.

The present invention has been made to solve the drawbacks of the conventional digital telescope, and includes a telescope, a rotation shaft for vertically and/or horizontally rotating the telescope, and a rotary shaft for rotating the telescope vertically and/or horizontally. Fine II that rotates the arm part of the tensioning frame that can tension the moving axis
The rotation angle of the k mechanism and the rotation wheel is electrically set to 15! a reading means for reading and l! obtained from the reading means; ! In a digital drag/jit that has a calculation means for calculating a digital angle lIj value from an input signal and a display means for displaying the calculation result from the calculation means as a digital value, there is no eccentricity between the tension frame arm and the fine movement mechanism. It is characterized by having a cam, an arm that rotates the eccentric cam, and an interpolation male screw that abuts the arm and has an interpolation scale of the digital angle value.

Embodiments of the present invention will be described below based on the drawings.

FIG. 5 is a cross-sectional view of the digital tractor/shift base, and the rotation shaft 10 of the support section 2 shown in FIG. It is rotatably supported by a bearing part of the base part.

A tensioning screw 15 passing through a horizontally long opening 131 formed in the base case 12 and having a tensioning knob 14 is attached to the arm portion 17 of the tensioning frame 11 . The tip of the tensioning screw 15 is in contact with a piece 16 held by the tensioning frame 11. In addition, a holder 18 having a cylindrical hollow part is attached to the housing 12, and a piston 20 is attached to the sliding holder 18 inside this hollow part via a holder 19. The tip of the piston 20 is the arm portion 17.
However, it is pressed against the d-needle 19. Furthermore, a female threaded portion 21 is attached to the housing 12, and a fine adjustment male screw 23 having a fine adjustment knob 22 is inserted into the female screw 21 so as to be engaged therewith. As shown in FIG.
A bearing hole 29 is formed in the movable base 26 which is fitted into the D hole 28, and the shaft member 3 is inserted into the bearing hole 29.
0 is rotatably inserted. An arm 31 is attached to the lower end of the shaft member 30. The upper end of the shaft member 30 is fitted into an eccentric cam 32 having a rotation center offset by Δ from the rotation center of the shaft member. The arm 31 has the housing 1
K11 is rotatably engaged with the female threaded portion 33 fixed to the inner handle 34', and the tip 36 of the male inner thread 35 is in contact with the inner handle 34'. In front, a weight 37 is interposed between the arm 31 and the movable base 26, so that the arm 3 is always
1 is biased in the direction in which the tip 36KE of the internal male screw 35 comes into contact with the tip 36KE.

The outer part 113g of the internal female thread 33 has an index 39.
is formed, and an interpolation scale 40 is formed on the inner inclined surface of the interpolation knob 34.

The ms diagram is a diagram schematically showing the relationship between the rotation amount of the screw to be inserted, the amplification means consisting of an arm and an eccentric cam, and the rotation angle of the arm portion of the tensioning frame. The first contact point 31 between the center O0 of the code plate 4s and the eccentric cam 32 of the arm portion 17 of the tension frame 11 (2)
Eccentric cam 3 with a distance of 81 and a center of 01
2C1 radius is ``, the eccentricity between the rotation center 02 of the arm 31 and the center 01 of the eccentric cam 32 is ``, the inner male screw 3
The distance from the rotation center 02 of the pitch TPS arm 31 (2) of 5 to the contact point S, t of the tip 36 of the internal male screw is defined as L. The amount of rotation of the eccentric cam 32 around the rotation center 02 is IFi, tan I-*eses＊＊＊＊＊s
a It can be expressed as (1). Also, due to the rotation of the eccentric cam 320, the contact point S of the arm portion 17 with the eccentric cam 32 is
The amount of movement Δ・ when moving to 2 is.

Δm=...1nI...Good-... (2) Here, if the rotation angle I is small, sln#=+tan#, so equation (2) is.

Δ-;...-Reference...φ... (3). Further, the rotation angle amount Δ accompanying the movement amount Δ− of the arm portion 17
α can be expressed as. The above equations (1), (3), and (4),
becomes.

Here, as a specific numerical example, R tajOW, @ m Q
, ! jll, P = / 11M, L = 2011
shall be. 1 Ratio Formula (5) K Substitute 6 = o, ooor Δα#100' Therefore, if the interpolation scale on the interpolation knob 35 is divided into 50 equal parts of the entire circumference, then this 1 scale corresponds to a rotation amount of 2" of the tension frame 11, that is, the telescope 1, and the code plate 4
This means that the lowest unit of the value read from the digital reading means by m can be interpolated in units of 2''.

Next, the operation of the digital transit having the above configuration will be explained. After aiming the telescope 1 at the target and setting the target point Pm approximately at the center of the crosshair 41 as shown in FIG. After tightening, by rotating the fine adjustment knob 22 and rotating the arm portion 17 of the tightening frame 11 via the insertion mechanism 25, the target object Pm is moved to the position Pm', that is, the crosshair. Align it with the center of line 41.

At this time, the amplification mechanism of the insertion mechanism, that is, the eccentric cam 31, etc., has no relation to the amount of rotation of the fine adjustment knob 22, and merely moves laterally due to the rotation of the fine adjustment male screw 23. The value displayed on the digital display device 7 when the target point P'm coincides with the cross line in the field of view, that is, the digital angle display of the target point is 142°52'50' and 6 as shown in Figure 7.
S-t*ko.

Assume that the indicated value of the interpolation scale of the interpolation knob 35 at that time was 8. Next, assume that the lowest reading unit of the digital angle display has changed by 10'' and the indicated value on the K interpolation scale in Figure 7 (B) is 5. Next, the left (or right) K At the position where the digital angle display changes by the lowest reading unit of 10", that is, the indicated value on the interpolation scale is 15" in Fig. 7(c).
Suppose it was. By the above operation, the lowest reading unit 1
0" corresponds to the (15-5)-10 scale of the interpolation scale, and the scale is (142°52'40'-1
It can be seen that this corresponds to 42852'20")/10=2". In the measurement of this example, the interpolation scale is 8, as shown in FIG. 7(A). Therefore, (8-5>=3, and 3 divisions from 142°32'30", that is, 2'
It can be detected that the reference position is X3=6''.As a result, the measured angle in this example is 142652'50
"+6"=142°52'S6".

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of the digital transit, Fig. 2 is an explanatory diagram of the relationship between the target point reference and the displayed value of the Digital Gingit, and Fig. 3 is a cross-sectional view of the interpolation mechanism section of the embodiment of the present invention. , FIG. 4 is a longitudinal sectional view of the interpolation mechanism, FIG. 5 is an explanatory diagram showing the driving relationship of the interpolation mechanism, and FIG. 6 is a diagram showing the digital angle display and interpolation scale in the interpolation reading operation of the present invention. Figure 1g7 is an explanatory diagram of the standard state of the telescope field of view. l...telescope, 2...cradle, 3...base, 10
-...Rotation axis, 11...Tightening frame, 12...Casing, 1
7... Arm portion, 32... Eccentric cam, 39... Index, 40... Interpolation scale No. 1!11 7 Figure r7 (A) (B) (C)

Claims (1)

[Claims] A telescope, a rotation axis for rotating the telescope around a vertical and/or horizontal axis, a fine movement mechanism for rotating a tension arm capable of tightening the wrinkle rotation axis, and a fine movement mechanism for rotating a tension arm that can tighten the wrinkle rotation axis; I can electrically check the rotation angle! 9 WR obtained from the recording means and the reading means
In the digital tractor/shift, which has a calculation means for calculating the rotation signal into a digital angle value, and a display means for displaying the calculation result from the rotation calculation means as a digital value, the tension frame arm and the angle structure are A digital transshift characterized by comprising: an eccentric cam, an arm for rotating the eccentric cam, and an interpolation male screw that abuts the arm and provides an interpolation scale for the digital angle value.